fastapi

Scope

Covers building and reviewing HTTP services with FastAPI: path operations and router organisation, the dependency-injection system, Pydantic v2 models as the request and response contract, error handling, the boundary between async and blocking code, lifespan-managed resources, streaming and Server-Sent Events, background work, security dependencies, the framework's native OpenTelemetry support, testing, and the FastAPI-specific parts of the toolchain.

The body is written against FastAPI 0.141, Pydantic 2.13 and Starlette 1.6; the native telemetry material against FastAPI 0.142.1, where it first shipped.

Not covered: